Pattern-stripping machine.



A fr0/Mrs'.

Patented Apr. 30,' 1912.

W. P. GRILL. PATTERN STRIPPING MACHINE. APPLICATION FILED JULY 27. 1911. 1,024,890.

' To all whom it may concern.:

. bracket 7a.

WILLIAM F.' GRILL, 0F DETROIT, MICHIGAN.

PATTERN-STRIPPING lvlAGHINE.v

. Specification of Letters Patent.

vlaten'te'd Apr. 30, 1912.

Application filed July 27, 1911. Serial No. 640,792.

'Be it known that I, WILLIAM- F. GRILL, citizen of the United States, residing at Detroit, county of lVayne, State of Michigan, have invented a certain new and useful Improvement in Pattern-Stripping Machines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in thejart to which it pertains to make and use the same, reference being had to -the accompanying drawings, which form a part of thisspecification.

This invention relates to pattern stripping mechanism.

It has for its object an improved device .to withdraw downward the pattern around which a mold has been made. A lspecial object of the improvement being to produce a reciprocating member having an adjustable engagement with the vertical posts -which hold the 4flask in order that the reciprocating member may be adjusted from time to time to engage closely upon the track. In the drawings Figure 1, is a side elevation. Fig. 2, is a front elevation. Fig. 3, is a detail of the turn buckle by which adjustment is made.

In the frame of the machine the bed plate 1 is mounted uponwheels 2;l a stripping plate is supported above-the bed plate on posts 4 and 5, 4a, and a fourth post (not shown in the drawings). The movable plate 8 to which the pattern is secured rests upon slidable brackets 7, 7a thatengage against the posts 4 and 5, 4 and the companion post to 5. Preferably the posts are rectangular in cross section and are arranged with one diagonal of the rectangular A- cross section of each post parallel with the axles of the wheels 2 and one diagonal of the rectangular cross sect-ion of each post at right angles to the axles of the wheels 2. This brings an angle of the post into engagement witha rectangular groove in the bracket 7, and an angle of the post 4 into engagement with a rectangular groove of the bracket is provided with holes through which bolts 6V engage to secure the bracket to the movable plate 8, the holes in one or the other' ofthese members-being oval to permit of a slight adjustment 'of the brackets with respect to the plate. The brackets 7 and 7l between posts 4A and 5 areftiedjto- The horizontal arm of each get-her by'a turn buckle 9 having a r'ght' hand screw cut on one end and a left and screw cut on the other end thereof, and these erfgage through hanging threaded vlugs 10 and 10a.

The plate 8 `is provided with f ears 11 through which engage actuating pitman 12 pivotally connected to a link 13, which link 13 is pivotally connected to a crank arm 14 on shaft 15. The shaft 15 is keyedto the crank arm 14; the half rotation of this shaft draws the plate 8 down tothe limit of its lower'travel and the return movement` to the position shown in Fig. 1 lifts it to the uppermost limit of it-s travel. The pattern i (not'shown) rests on the plate 8 and projects through the opening 16 to the space above the stripping plate 3. The amount of projection of the pat-tern above the stripping plate 3 is regulated by the pitman 12 which engages through the ears 11 and may be adjusted by means of nuts 18 and 19.

. The adjustment to prevent any improper side motion is effected by means ofthe turnbuckle 9. The constant reciprocation of the plate 8 and the brackets connected with it along the posts wear the` sliding surfaces rapidly, such wear is provided for by Inaking the brackets adjustable by meansof the turnbuckle and the movable brackets, the rectangular form of the posts and their angular relation to the frame co-,acting with the rectangular rentering groove in the brackets effect complete provision for this purpose. In use the plate 811s adjusted on the pitman 12 to bring the parting lines of the-pattern in use to the proper place when lthe plate 8 is at the extreme upper limit of its throw.

1. A pattern stripping machine, having in combination a stripping plate supportedin a fixed position, a .vertically movable plate arranged thereunder and adapted to support a pattern, vertical guides, brackets adapted to run on said guides and.. connected with said movable plate by bolts engagingl in slots, and a turn buckle adapted -to connect two brackets and adjust the same with respect to their guides, substantially asv described.

' 2. A pattern stripping machine, havingin.

combination a stripping plate supported 4in,

fixed position, 'a vertically gnovable' plate arranged hereunde' and adapted ilo support a patefn, vercal guides, brackets-adagted t@ 'ruin on said. g'uds and provided Wih :1 Sldable connection with said;- plata, and 'Lulnbuckle adap'ked in connect "Wo brackeis and adjust the same Wh zms'ci, t@ thais? guides. subsmnaly :Ls descrbe.

WCLLlLM, F. Gr HILL. 

